Nitmai, P., & Keeratichamroen, D. (2023). A Study of Learning Achievement and Klui Pang-Aw Practical Skills of Grade 9 Students Using Flipped Classroom with Gamification. KKU Research Journal (Graduate Studies) Humanities and Social Sciences, 11(1), 53–64. retrieved from https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/263244